DIY 16 valve adjustment tool,...

[JJ]

Thanks that was a very informative post. Did you realize that 2+2=4?
Set for 4
Get -2 due to bad technique
End up with 2 on the gap..............

Do the maths; course No Biggie.

Yes, as an engineer, I know math as well as you do, Jim. You are ASSuming that any technique other than yours is a poor choice.

Wrong!

If they are set with an indicator, and checked/verified afterwards by the same method, they are just as good as setting them with your method, then checking afterwards with feelers.

You claimed in an earlier post that you can get as close as .00025" using feelers. I may believe .0005" at best, but no closer.

And no, .002" variation from nominal is no biggie. I don't think that .002" above or below the UL and LL is intolerable.

Don't you think the factory engineers built in a safety factor when they calculated the recommended settings?

[posplayr]

Yes, as an engineer, I know math as well as you do, Jim. You are ASSuming that any technique other than yours is a poor choice.

Wrong!

If they are set with an indicator, and checked/verified afterwards by the same method, they are just as good as setting them with your method, then checking afterwards with feelers.

You claimed in an earlier post that you can get as close as .00025" using feelers. I may believe .0005" at best, but no closer.

And no, .002" variation from nominal is no biggie. I don't think that .002" above or below the UL and LL is intolerable.

Don't you think the factory engineers built in a safety factor when they calculated the recommended settings?

.001mm difference between two feelers used to set the clearance. That means that the maximum error would be between 0.0005mm and 0.0000mm

standard deviation is .0005/sqrt(12) = .000144 mm

2 sigma (IIRC 86 percentile) is then .00028 mm very close to my quoted 0.00025 (an engineering swag). You going for 6 sigma?

I'm not assuming anything other than engineering principles. You are assuming you can win an argument here.

The fact that you are arguing without any substantive argument says you can't.

P.S the safety factor specified by the factory has an implicit assumption that the person setting the gap is using an appropriate tool and can get the gap correct (e.g. within 0.00025mm). If they are going to error by 0.002mm (more than 10 times that) then they would have increased the gap by a similar amount. .004 mm RSSed with .00025 is still .004. RSS with .002 and you need to increase the spec to 0.006 to insure you stay larger than .004mm.

Try again......................

[JJ]

.001mm difference between two feelers used to set the clearance. That means that the maximum error would be between 0.0005mm and 0.0000mm

My bad. For some reason, my mind saw INCHES. So, you think you can get within .00025mm, as in quarter of a micron?

I would never dream of winning an argument with you. Not that I couldn't, but that you'd never admit it even in the face of overwhelming evidence.

Anywho... I am not going to start beating a dead horse. You aren't worth my time.

[posplayr]

My bad. For some reason, my mind saw INCHES. So, you think you can get within .00025mm, as in quarter of a micron?

I would never dream of winning an argument with you. Not that I couldn't, but that you'd never admit it even in the face of overwhelming evidence.

Anywho... I am not going to start beating a dead horse. You aren't worth my time.

I laid out each step of the calculation you don't even know which point to attack?

You should stick to berating me in the Vortex where I'm ignoring you.

[posplayr]

I realized I'm mixing units.
.001 is in inches not mm so the tolerance using the the dual feeler gauge method is 1/4 of that or .00025" rather than in mm.

[JJ]

You should stick to berating me in the Vortex where I'm ignoring you.

Do us both a favor and ignore me forum-wide.

[GSXR7ED]

Wow, posplayr and JJ? Very interesting. {S}


Ed